Ratchet mechanism.



No- 808,946'. PATENTED JAN. 2, 1906. M. REISOH.

RATOHET MECHANISM.

APPLICATION FILED MAY 24.1905

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UNITED e r-Arn e earner OFFICE.

MICHAEL REISCH, OF BUFFALO, NEW YORK, ASSIGNOR TO EMILY REISCH, OF BUFFALO, NEW YORK.

RATCHET iJiECHANlSM.

Specification of Letters Patent.

Patented Jan. 2, 1966.

To aZZ whom it may concern:

Be it known that 1, MICHAEL Rnison, a citizenof the United States, residing at Buffalo, in the county of Erie and State of New York,

cillating movement of the actuating shell,

casing, or member is produced in the forward or efiective direction by the pull of the actuating strap or band and in the opposite or return'direction by a coiled spring which is strained during the forward rotation of the oscillating member. It sometimes happens that an unskilled operator will turn the grinding-wheel by hand in the wrong direction and so far that the spring is buckled or broken.

The objects of this invention are to so construct the "spring mechanism that the spring cannot be injured by turning the grindingwheeltin the wrong direction, to render the parts simple, strong, and durable, and to facilitate the assembling and separating of the parts.

In the accompanying drawings, Figure l is a front elevation of a grinding mechanism provided with my improvements. Fig. 2 is a longitudinal section of the ratchet and spring mechanism on an enlarged scale. Figs 3 and 4 are cross-sections in lines 3 3 and a 4, Fig. 2, respectively. Fig. 5 is a detached perspective view of the arbor. Fig. 6 is a detached perspective view of the spring-sleeve.

Fig. 7 is a side view showing the lip of the s'ring disengaged from the tooth of the s eeve. 7/ i T like letterscf reference refer to like parts in the several figures.

The stationary frame of the grinding or other machine in which the mechanism is embodied may be constructed in any suitable ,manner and may comprise, as shown, a base hand standards A N.

A, adapted to be attached to a table or workbench by a set-screw a, and left and right The left hand standard A may be provided with a tool-rest a.

B represents the horizontal arbor or stationary shaft, which is supported in the standards A A and held against turning. This arbor has a flat or oblong right-hand portion 1) of such size that it can be passed through the round opening 0 in the lefthand standard A and inserted into a corresponding flat or oblong opening 0 in the right-hand standard A whereby the arbor is supported and held against turning.

D represents the actuating-shell, casing, or hollow membe which is mounted to turn forwardly and backwardly upon the arbor B. This casing comprises a neck or reduced body (1, upon which the actuating-strap d is wound, and which is provided with a cylindrical bore by which it fits upon the cylindrical part of the arboradjacent to the oblong part b of the latter. The casing D further comprises on the righthand side of the neck the spring-casing E, containing the coilspring F, and on the lefthand side of the neck the ratchet-sleeve G, surrounding the ratchet-disk H. I represents the grindingwheel or other rotary part, to which the ratchet-disk may be secured by any suitable means-for instance, as shown, by a hub h, extending through the wheel and secured by a nut h. 7c represents the rollers, which are interposed between the ratchet-sleeve G and the 'disk' H. This ratchet mechanism is preferred and is so constructed that it causes the grinding-wheel to rotate in a downward direction on the front side, so as to deliver the sparks downwardly. Any other suitable ratchet mechanism may, however, be employed.

The coil-spring is secured at its outer end to the spring-casing E by anys uitable meansfor instance, as shown, by an'enlargement or loop f, formed on the end of the spring and preventing the latter from being drawn through a notch f in the casing in which the spring is arran ed. The coil-spring is held at its inner end y a sleeve L, which is rigidly attached U0 the arbor and provided on its periphery with a tooth Z, withwhich' a hook or holding-lip m, formed on the inner end of the spring, engages. back, against which the hook catches when The tooth has an abrupt the spring is strained by the forward rota- J tion of the casing in the direction of the arrow, Fig- 3 The face of the tooth is inclined or curvedso as to allow the hook of the spring to s ide over the same when the inner end of the spring is moved in the reverse 211- rection. The holding-sleeve. L is provided i with an oblong bore, which fits the oblong art 6 of the arbor and whereby the sleeve is lield in position against the working strain applied to the spring by the actuating strap or band turning the spring-casing forwardly; but if the spring-casing should be turned backwardly contranytothe direction indicated by the arrow in Fig. 3 to such. an extentthat the strain on the spring is released the inner end of the spring leaves the holding-tooth'ol the sleeve and travels around the sleeve in the wrong direction, the holding-hook of the sprim passing over the inclined or curved. face 0 the tooth oi the sleeve without catchingfand no buckling or breaking of the spring canta qe place in these circumstances.

, In cnibling the parts or" the machine the whe ratchet rollers, actuating casing,

able means.

. sprin {securely held in their working posit and spring-sleeve are placed in. position ortween the standards A A? of the frame, and. the arbor is then inserted, its 0blong or fiat end portion passing into the sleeve' and the oblong opening of the righthand standard A thus securing the parts in their operative position. The arbor is secured in place by a cotter-pin it or other suit- If it becomes necessary to separate the parts for cleaning or repairing, the

arbor is released and withdrawn, thereby separatim the parts. 'ihc machine can be assembled ortaken apart in a very simple and expeditious manner, and. th are ion assembled, while injury by improper use is avoided.

I claim as my inventionp l. The combination of ajsupportingd'rame, an arbor held in the same against rotation and provided with a fixed holdii'ig-tooth having an inclined face and an abrupt baclgan oscillatory actuatipg-casing mounted on said arbor, a ratchetrmechanisin actuated by said cos,

casing, and a return-spring. having its outer end attached to said casin and its inner end provided with a holdingd ipwhich engages the abrupt back of semi tooth under the workinq strain and is free to move away from said tooth when the spring is strained in the opposite direction, substantially as set forth. 5o 2. The combination of a supporting-frame, a removable arbor held therein against rota tion, a sleeve having' a holding-tooth and having a bore for the insertion of the arbor, said arbor and sleeve bein provided with means for preventing the sieve from turning on the arbor, an oscillatory actuatingcasing mounted on said arbor, a ratchet mechanism actuated by said casing, and a return-spring having its outerend attached to said casing and its inner end provided with a holding-lip-which engages said holding-tooth under the working strain and is free to move away from said tooth when the spring is strained in the opposite direction, substan- '65 tially as set forth. 3. The combination of a supporting-frame having arbor-seats, one of whlch is fiat sided, an arbor adapted. to be inserted into said seats and havinga flat-sided end portion engaging in said hat-sided seat, a sleeve rovided with a holding-tooth and having a atsided bore fitting the fiat-sided portion of said arbor, an oscillatory actuating-casing mounted. on said arbor, a ratchet mechanism 7 5 actuated. by said casing, and a return-sprin he we end attached to said casing an n end provided with a holding-lip which mgages the tooth of said sleeve, sub- 7/ stantialiy as set forth; 8o

l/E itness my hand this 20th day 0fMay,

MICE AEL REISCH.

W itncsses:

- EDWARD O. Hnnn,

O. B. gloimsnoir. 

